package com.itheima.interceptors;

import com.itheima.utils.JwtUtil;
import com.itheima.utils.ThreadLocalUtil;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest Request, HttpServletResponse response, Object handle)throws Exception{
    //令牌验证
        String token = Request.getHeader("Authorization");
        try {
            Map<String,Object> claims = JwtUtil.parseToken(token);

            //把业务数据存储到ThreadLocal中
            ThreadLocalUtil.set(claims);

            //放行
            return true;
        }catch (Exception e){
            //http响应状态码为401
            response.setStatus(401);
            //不放行
            return false;
        }
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空ThreadLocal中的数据
        ThreadLocalUtil.remove();
    }
}
